Garage Paint

In message , Rod writes

I brightened mine up by first brushing them down thoroughly. It's amazing how much dust there is, not to mention sand from the mortar. Coat of diluted PVA to seal the surface. Sorry but I can't remember the exact ratio. Two coats of cheap white emulsion on top, using a masonry brush. I actually used an old wallpaper paste brush. Coverage was much less than it says on the container as I slapped it on quite thickly to cover all the depressions in the blocks. Still got nearly half a wall (about 2m out of a total of 15m) to do as that's where the electrics are and the freezer is in front of it as well.

End result is very pleasing as it's a lot cleaner and brighter and there's far less dust about. The local wildlife like it too as I removed five visiting mice in four days.

I would probably plump for exterior grade paint like Weatthershield.

Like you I had lots of left over emulsion so after brushing the walls down I applied emulsion with a roller. It needed 2 or 3 coats but has stood now for 7 years and is still looking good. Certainly painting cut down a lot of the dust you mention.